Guys i need help now

It sounds like your trying to use an old Atx power supply. You need to buy a new one.

you need 2 x 4 pin or 1 x 8 pin on the psu

if your psu doesnt have them you need a molex or sata power adaptor to 4 pin

Connect the 4-pin into the 8-pin connector ( http://www.tomshardware.co.uk/forum/301980-12-p8z68-gen... )

i think i should buy a cable like this http://www.google.gr/imgres?hl=el&sa=X&biw=1024&bih=677...

Even if you buy that extender, you won't be getting the correct power that your CPU needs. If you don't plan on stressing it too much, get the extender. But I wouldn't recommend it. Don't cheap out on a build. Buy a good power supply with plenty of headroom.

i just want it for this month in december i will buy a new better psu

but will it work?

It will work. with a BIOS update. Does the CPU fan spin with the 4-pin connected?

i dont know man i just looked another thread like mine he put the 4 pin connector on the 8 pin without molex and it woked maybe it is a front ppanel problem i dont know

Can't you see if the CPU fan does spin when powering up? The CPU requires a newer BIOS version, so it might be that you need to flash it before using the CPU: http://www.gigabyte.us/support-downloads/cpu-support-po...

no nothing happens i push the button and it doesn't start

Do the case fans spin?

no

if upload photos of the mobo would it be helpful ?

Yes. If the fans do not spin, then the power supply doesn't start. What power supply do you use? Have you checked the board's manual when connecting the front panel?

my psu is a hec pro 385 and when i asked here if it is compatible or not someone told me that it will be

It should at least turn the fans. Test the board without the graphics card (use the onboard). There's a test for power supplies (using a paper clip): http://www.youtube.com/watch?v=5FWXgQSokF4.
Check also the connections of the power cables and of the front panel switches. If unsure how to connect them, check the manual.

No it doesnt do anything ,but i have problem with front panel connectors i haven't connected these cables:
Message/power/sleep led
chassis intrussion header
Speaker
SPDIF_O(S/PDIF Out Header)
F_USB30(USB3.0/2.0 Header)
F_USB 1/2(USB2.0/1.1 Headers)

The power supply has a ATX 20+4 pin and a 4-pin CPU connector. Connect the 20+4 to the board's 24 pin connector and the 4-pin to the corresponding board's one. Connect a case fan to the molex or to the board's header. Connect the power switch to the board's connector. No other connections (disconect all other cables). Start the board. The fans should start spinning.

and then what will it start, by the way are you from greece ?

No, Romania. You'll check if the power supply powers the board (fans start spinning). You can find some tutorials regarding motherboard installation on Youtube. If you don't have the board's manual, I can provide a link.

if it doesn't then i have to buy new psu?

Buy parts only if you're sure they are faulty. I suggest taking the computer to a local shop for troubleshooting.

ok but i am sure that my psu isnt faulty because yesterday with my old mobo and old cpu worked fine